configures redirectTo to accept regex

README.md

@@ -332,12 +332,13 @@ expect(res).to.not.redirect;
 
 ### .redirectTo
 
-* **@param** _{String}_ location url
+* **@param** _{String|RegExp}_ location url
 
 Assert that a `Response` object redirects to the supplied location.
 
 ```js
 expect(res).to.redirectTo('http://example.com');
+expect(res).to.redirectTo(/^\/search\/results\?orderBy=desc$/);
 ```
 
 ### .param

lib/http.js

@@ -273,7 +273,7 @@ module.exports = function (chai, _) {
    * expect(res).to.redirectTo('http://example.com');
    * ```
    *
-   * @param {String} location url
+   * @param {String|RegExp} location url
    * @name redirectTo
    * @api public
    */
@@ -284,8 +284,16 @@ module.exports = function (chai, _) {
     new Assertion(this._obj).to.redirect;
 
     if(redirects && redirects.length) {
+      var hasRedirected;
+
+      if (Object.prototype.toString.call(destination) === '[object RegExp]') {
+        hasRedirected = redirects.some(redirect => destination.test(redirect));
+
+      } else {
+        hasRedirected = redirects.indexOf(destination) > -1;
+      }
       this.assert(
-        redirects.indexOf(destination) > -1
+        hasRedirected
         , 'expected redirect to ' + destination + ' but got ' + redirects.join(' then ')
         , 'expected not to redirect to ' + destination + ' but got ' + redirects.join(' then ')
       );

test/http.js

@@ -223,6 +223,12 @@ describe('assertions', function () {
     res = { status: 200, redirects: ['bar'] };
     res.should.not.redirectTo('foo');
 
+    res = { status: 200, redirects: ['foo'] };
+    res.should.redirectTo(/foo/);
+
+    res = { status: 200, redirects: ['foo/bar?baz=qux'] };
+    res.should.redirectTo(/^foo\/bar/);
+
     (function () {
       var res = { status: 301, headers: { location: 'foo' } };
       res.should.not.redirectTo('foo');
@@ -237,6 +243,16 @@ describe('assertions', function () {
       var res = { status: 200, redirects: ['bar', 'baz'] };
       res.should.redirectTo('foo');
     }).should.throw('expected redirect to foo but got bar then baz');
+
+    (function () {
+      var res = { status: 301, headers: { location: 'foo' } };
+      res.should.not.redirectTo(/foo/);
+    }).should.throw('expected header \'location\' not to match /foo/ but got \'foo\'');
+
+    (function () {
+      var res = { status: 200, redirects: ['bar', 'baz'] };
+      res.should.redirectTo(/foo/);
+    }).should.throw('expected redirect to /foo/ but got bar then baz');
   });
 
   it('#param', function () {

types/index.d.ts

@@ -23,7 +23,7 @@ declare global {
         }
 
         interface Assertion {
-            redirectTo(location: string): Assertion;
+            redirectTo(location: string|RegExp): Assertion;
 
             param(key: string, value?: string): Assertion;